Kellys Theos F: suspension setup & specs

Manufacturer data retrieved on 27 September 2026 · 6 builds · Bike type: Full-suspension e-MTB

The Kellys Theos F is an e-MTB for trail and touring with 150–180 mm of fork travel and 140–170 mm at the rear. It is powered by SHIMANO EP8 or SHIMANO EP800 or SHIMANO EP801. Here you will find all 6 current builds with fork, shock and shock size, plus matching SAG and tyre pressure starting values.

Calculate the setup for your Kellys Theos F →

All builds

Fork, shock, shock size (eye-to-eye length × stroke) and rear travel, motor, weight and price according to the manufacturer. Wheel size: MX.

Build	Fork	Shock	Shock size	Rear travel	Motor	Weight	RRP	Calculator
100 SH MX 825 Wh	RockShox Lyrik Ultimate (150 mm)	RockShox Super Deluxe Select+ RT	210x55	140 mm	SHIMANO EP801 825 Wh	20.6 kg	–	Setup →
50 SH MX 725 Wh	RockShox 35 Gold RL (150 mm)	RockShox Deluxe Select R	210x55	140 mm	SHIMANO EP800 725 Wh	–	–	Setup →
60 SH MX 725 Wh	RockShox 35 Gold RL (150 mm)	RockShox Deluxe Select R	210x55	140 mm	SHIMANO EP8 725 Wh	–	–	Setup →
60 SH MX 820 Wh	RockShox Domain R (150 mm)	RockShox Super Deluxe Select+ RT	210x55	140 mm	SHIMANO EP801 820 Wh	–	–	Setup →
70 SH MX 820 Wh	RockShox Zeb Select+ (180 mm)	RockShox Super Deluxe Select+ RT	230x65	170 mm	SHIMANO EP801 820 Wh	–	–	Setup →
90 SH MX 820 Wh	FOX 38 Float Factory (180 mm)	RockShox Super Deluxe Ultimate RC2T	230x65	170 mm	SHIMANO EP801 820 Wh	–	–	Setup →

How it compares

150–180 mm at the fork almost exactly matches the 150 mm median of the 101 bikes in the “e-MTB for trail and touring” category in our database. Of Kellys’s e-mountain bikes, the Kellys Theos F offers the least travel up front. Kellys builds the frame from carbon.

The lightest build, 100 SH MX 825 Wh, weighs 20.6 kg according to Kellys – about 2.8 kg less than the category median (23.4 kg across 49 bikes with a stated weight). For suspension, Kellys combines components from FOX and RockShox. The fork line-up ranges from the RockShox Lyrik Ultimate to the FOX 38 Float Factory. Drive comes from SHIMANO EP801 or SHIMANO EP800 or SHIMANO EP8, paired with 725–825 Wh of battery capacity.

Setup notes for this spec

Air fork (RockShox Lyrik Ultimate): the air valve is on top of the left leg under a cap. Change pressure in small steps (about 5 psi (0.34 bar)) and cycle the fork a few times afterwards so the air chambers can equalise.
Rebound: turn the red FOX and RockShox adjuster fully closed first and count clicks from there – that way you can note settings and restore them later.
Air shock (RockShox Super Deluxe Select+ RT): measure SAG in your riding position, ideally with a helper holding the bike. Cycle the shock a few times after every pressure change.
e-MTB: because of the extra weight, start with slightly more tyre pressure – the surcharge is already built into the table below.

Target SAG for the Kellys Theos F

The table converts the recommended SAG percentages into millimetres, so you can check them with the O-ring directly on the stanchion and on the shock shaft. Adjust the air pressure until the value is right. If Kellys specifies its own target SAG for your model, that takes priority.

150 mm fork, 55.0 mm shock stroke (100 SH MX 825 Wh, 50 SH MX 725 Wh, 60 SH MX 725 Wh, 60 SH MX 820 Wh)

Riding style	Fork SAG	Shock SAG
XC / touring	17 % = 26 mm	24 % = 13.2 mm on the shock shaft
Trail	20 % = 30 mm	28 % = 15.4 mm on the shock shaft
Enduro / rough	22 % = 33 mm	30 % = 16.5 mm on the shock shaft
Bike park	20 % = 30 mm	27 % = 14.9 mm on the shock shaft

180 mm fork, 65.0 mm shock stroke (70 SH MX 820 Wh, 90 SH MX 820 Wh)

Riding style	Fork SAG	Shock SAG
XC / touring	17 % = 31 mm	24 % = 15.6 mm on the shock shaft
Trail	20 % = 36 mm	28 % = 18.2 mm on the shock shaft
Enduro / rough	22 % = 40 mm	30 % = 19.5 mm on the shock shaft
Bike park	20 % = 36 mm	27 % = 17.6 mm on the shock shaft

How to measure SAG is explained in our guide SAG setup.

Tyre pressure starting values

The values apply to 2.40″ wide tubeless tyres with a trail casing, including the e-MTB surcharge. With an inner tube add about 0.2 bar (2.9 psi), with an insert take off about 0.1 bar (1.5 psi). Stock tyres: SCHWALBE Eddy Current Evo Super Trail 62-622 (29x2.40) Tubeless Easy, ADDIX Soft, folding front / SCHWALBE Eddy Current Evo Super Gravity 65-584 (27.5x2.60) Tubeless Easy, ADDIX Soft, folding rear; SCHWALBE Magic Mary Evo Super Trail 62-622 (29x2.40) Tubeless Easy, ADDIX Ultra Soft, folding / SCHWALBE Big Betty Evo Super Trail 65-584 (27.5x2.60) Tubeless Easy, ADDIX Soft, folding; SCHWALBE Nobby Nic Evo Super Trail 62-622 (29"x2.40) TLE, ADDIX SpeedGrip, folding / SCHWALBE Nobby Nic Evo Super Trail 62-584 (27.5"x2.40) TLE, ADDIX SpeedGrip, folding; SCHWALBE Nobby Nic Evo Super Trail 62-622 (29"x2.40) Tubeless Easy, ADDIX SpeedGrip, folding / SCHWALBE Nobby Nic Evo Super Trail 62-584 (27.5"x2.40) Tubeless Easy, ADDIX SpeedGrip, folding; SCHWALBE Nobby Nic Performance 65-622 (29"x2.60) ADDIX / SCHWALBE Nobby Nic Performance 70-584 (27.5"x2.80) ADDIX; SCHWALBE Nobby Nic Performance 65-622 (29x2.60) ADDIX / SCHWALBE Nobby Nic Performance 70-584 (27.5x2.80) ADDIX.

Ready-to-ride weight	Front	Rear
60 kg	1.48 bar (21 psi)	1.68 bar (24 psi)
70 kg	1.60 bar (23 psi)	1.80 bar (26 psi)
80 kg	1.72 bar (25 psi)	1.92 bar (28 psi)
90 kg	1.84 bar (27 psi)	2.04 bar (30 psi)
100 kg	1.96 bar (28 psi)	2.16 bar (31 psi)
110 kg	2.08 bar (30 psi)	2.28 bar (33 psi)
120 kg	2.20 bar (32 psi)	2.40 bar (35 psi)

Air pressure in the fork and shock

You will find a guide value for air pressure on the fork sticker (or on the shock) or in the suspension makers’ charts. Our calculator also takes riding style and rebound into account. In the end, measured SAG is what counts.

Note: all values without guarantee. Specification can vary by model year, frame size and market – if in doubt, the type plate, the manual and Kellys’s information apply. Never exceed maximum pressures.